/* ==========================================================================
   base.css — reset, primitivas, container, scaffolding de seção.
   Carregado após tokens.css. Só consome var(--*); nenhum valor cru de marca.
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* âncoras (#form, #top) não ficam escondidas sob o header fixo */
  scroll-padding-top: var(--header-h);
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-body-size);
  line-height: var(--font-body-leading);
  color: var(--color-ink);
  background: var(--color-canvas);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip; /* seguro contra sangria horizontal de elementos decorativos/fixos */
}

img, picture, video, svg { display: block; max-width: 100%; }
img, video { height: auto; }

a { color: inherit; text-decoration: none; }

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }

ul { list-style: none; padding: 0; }

h1, h2, h3, h4 { font-weight: var(--font-weight-bold); line-height: 1.1; }

:focus-visible { outline: 3px solid var(--color-focus); outline-offset: 2px; }

/* Skip link (acessibilidade): some até receber foco por teclado. */
.skip-link {
  position: absolute; left: var(--space-md); top: -100px; z-index: var(--z-overlay);
  background: var(--color-surface); color: var(--color-ink);
  padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card); transition: top var(--motion-fast) var(--motion-ease-out);
}
.skip-link:focus { top: var(--space-md); }

/* ----- Layout: container e seção ----------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: var(--space-3xl); }

/* Cabeçalho de seção (eyebrow + título + lead), padrão reutilizado. */
.section__eyebrow {
  font-size: var(--font-eyebrow-size);
  font-weight: var(--font-eyebrow-weight);
  line-height: var(--font-eyebrow-leading);
  letter-spacing: var(--font-eyebrow-tracking);
  text-transform: uppercase;
  color: var(--color-brand);
  margin-bottom: var(--space-sm);
}
.section__title {
  font-size: var(--font-h2-size);
  font-weight: var(--font-h2-weight);
  line-height: var(--font-h2-leading);
  letter-spacing: var(--font-h2-tracking);
  color: var(--color-ink);
  max-width: 24ch;
}
.section__lead {
  margin-top: var(--space-md);
  max-width: var(--container-narrow);
  font-size: var(--font-body-lg-size);
  line-height: var(--font-body-lg-leading);
  color: var(--color-ink-muted);
}

/* Em blocos escuros, o cabeçalho de seção inverte as cores. */
.section--dark .section__eyebrow { color: var(--color-on-dark-muted); }
.section--dark .section__title { color: var(--color-on-dark); }
.section--dark .section__lead { color: var(--color-on-dark-muted); }

/* ----- Ícone two-tone (sprite) ------------------------------------------- */
/* O <svg class="ico"> escala o símbolo no box preservando a proporção (meet). */
.ico {
  display: inline-block; flex: none;
  width: var(--icon-md); height: var(--icon-md);
  vertical-align: middle;
}
.ico--lg { width: var(--icon-lg); height: var(--icon-lg); }

[hidden] { display: none !important; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}